This paper is a review of the most recent and relevant achievements (from 2001 to 2013) on the development of organic–inorganic hybrid (OIH) coatings produced by sol–gel-derived methods to improve resistance to oxidation/corrosion of different metallic substrates and their alloys. This review is focused on the research of OIH coatings based on siloxanes using the sol–gel process conducted at an academic level and aims to summarize the materials developed and identify perspectives for further research. The fundamentals of sol–gel are described, including OIH classification, the interaction with the substrate, their advantages, and limitations. The main precursors used in the synthesis of OIH sol–gel coatings for corrosion protection are also discussed, according to the metallic substrate used. Finally, a multilayer system to improve the resistance to corrosion is proposed, based on OIH coatings produced by the sol–gel process, and the future research challenges are debated.

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Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress

Corrosion protection of clad 2024 aluminum alloy anodized in tartaric-sulfuric acid bath and protected with hybrid sol–gel coating

Unanticipated bright blue fluorescence produced from novel hyperbranched polysiloxanes carrying unconjugated carbon–carbon double bonds and hydroxyl groups

Effective corrosion protection by eco-friendly self-healing PMMA-cerium oxide coatings

Corrosion resistance of siloxane–poly(methyl methacrylate) hybrid films modified with acetic acid on tin plate substrates: Influence of tetraethoxysilane addition

Electrochemical study of TEOS, TEOS/MPTS, MPTS/MMA and TEOS/MPTS/MMA films on tin coated steel in 3.5% NaCl solution

ABSTRACT The aim of this study was to produce exploratory multimodal analysis on joint attention. We used the ELAN tool: software with resources for temporal and special synchronization for verbal and non-verbal modalities that facilitate the visualization and annotation of interactional contexts. Excerpts of ten minutes of speech and language pathology evaluation of the child with suspected ASD and of another child with typical development matched by age group and gender, were analyzed and transcribed. Spontaneous occurrences of the child's gaze were investigated: a) Towards the interlocutor's eyes. b) Towards toys or play. c) Towards the interlocutor's eyes and toys (Joint Attention). The occurrences of look direction differed between children in a quantitative and qualitative way. The child with suspected ASD did not produce an episode of joint attention, nor did he direct his gaze to the interlocutor. There were 56 occurrences of gazing towards the toys. The typical child produced 18 occurrences of joint attention, and whenever he directed his eyes to the interlocutor's eyes, he did so with the intention of sharing the toy or play. We also observed 37 occurrences of gazing towards the toy or play. From the exploratory analysis produced by ELAN tool, it was possible to observe that there were differences in the number of occurrences and look direction between the evaluated children and to verify that the joint attention was absent in the child with ASD risk.

F. M. Di L. da Cruz

Papers

Electrochemical study of TEOS, TEOS/MPTS, MPTS/MMA and TEOS/MPTS/MMA films on tin coated steel in 3.5% NaCl solution

Exploratory study on the multimodal analysis of the joint attention